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# Computer Science Help

Choose Desklib’s computer science assignment help for your academics and open the doors to the new era’s smart learning system. Computer science is the subject wherein students get theoretical knowledge of the technology and its working and the practical experience of it.

1. a) Consider a database with objects A, B, and C, and the following two transactions T₁ and T₂ involving those objects: T₁ T₂ begin_transaction begin_transaction read(A) read(A) read(B) read(B) read(C) read(C) If A = 13, B := B + B if B = 13, A := A + 1 C := C + 3 C := C + 2 write(B) write(A) write(C) write(C) Commit commit Let the initial values of A and B be 13, and the initial value of C be 10. Also let the consistency requirement be: either A = 13 or B = 13 Show the values that A, B and C would have after the (serial) execution of transaction T₁ followed by the execution of T₂. Show the values of A, B and C if the transactions were executed in the reverse order instead, that is, first T₂ was executed, and then T₁. b) Describe what Database consistency means and using the two findings in part(a) above, show that every serial execution of these two transactions T₁ and T₂ preserves the consistency of the database. (Limit your answer to 60 words) c) This question assumes the following relation schema: Employees(employeeNumber, lastName, firstName, DOB, HireDate, Position, Salary, DeptID) Primary Key: employeeNumber Foreign Key: DeptID refers to DeptID in Departments Departments(DeptID, DeptName, DeptLocation) Primary Key: DeptID Given the following expression in the Relational Algebra: employeeNumber, lastName, firstName, DeptName((Position = 'Manager' Employees) Departments) Show the corresponding SQL query.
2. A function is declared: void bazz(long A[], long B[], int n) { /* …. */ } The compiler, given -Og option, generates the following code: movl \$0, %eax .L2: cmpl %edx, %eax jge .L4 movslq %eax, %rcx movq (%rsi, %rcx, 8), %r8 addq %r8, (%rdi, %rcx, 8) addl \$1, %eax jmp .L2 .L4: ret (Note: the movslq instruction moves and sign-extends the low-order 32 bits of a register to the full 64-bit destination register.) Write the C code for the body of this function.
3. Task 2: Submission Format:  A step by step record of the development and debugging of a program from an algorithm with demonstrations of the running code.  The running (compiled/interpretable) code in executable form.  An evaluation report (500 words +/- 100) on using or not using an IDE for software Development.  An evaluation of the debugging process.  An explanation of coding standards and a critical evaluation of the necessity for their use both by individuals and teams.
5. Write the definition of an algorithm, along with a clear outline of the process of developing and building an application.
6. write a program that calculates the occupancy rate of a hotel. The program should start by asking the user how many floors the hotel has. a loop should then iterate once for each floor. In each iteration, the loop should ask the user the number of rooms on the floor and how many of them are occupied. After all the iterations, the program should display how many rooms the hotel has, how many of them are occupied, how many of them are unoccupied, and the percentage of rooms that are occupied. The percentage may be calculated by dividing the number of rooms occupied by the number of rooms. INPUT VALIDATION: do not accept a value less than 1 for the number of floors.

## Computer science homework help

Computer science is the subject that studies computers and their programming which includes hardware, software, and the internet.

Computer science is the part of electrical engineering which studies the structure of a computer and all its binary functioning. The software part of computer science focuses on the functioning, algorithms, coding, programming languages, operating system.

Hardware is about the whole structure of the computer which includes monitor, CPU, keyboards, mouse while the internet focuses on the protocols, telecommunications, etc.

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Computer science is the subject wherein students get theoretical knowledge of the technology and its working and the practical experience of it. It is often considered as foundational science because of which knowledge about everything else is gained and thus students need to choose the right coursework for themselves.

Theoretical computer science

Theoretical computer science is a combination of mathematical and computer science concepts.

Theoretical computer science studies concepts like algorithms, logic, automata theory, combinatorics, computational complexities etc.

The various subjects of theoretical computer science include distributed computation, algorithms, cryptography, algebra, computational number theory, data structures, quantum computation and machine learning.

There are many topics that come together to form computer science as a subject. For computing, theoretical and practical aspects are worked on together.

Data science and big data

Data science is the process to bring out information from the data. It includes data analysis, statistics, machine learning and methods. The subject is drawn from statistics and mathematics.

Data science is of two types, traditional data and big data where traditional data is in which the text or number valued data is stored in a form of a table that can be handled by an analyst from one computer.

Big data is bigger than the traditional data because it is spread across many computers and not just one. It includes all video, text, mobile data, volume, images, velocity, etc.

Artificial Intelligence

Technological advancement has given human-like behavior and intelligence to the machines by making them work, think, make decisions, solve problems, and learn skills like humans.

When we hear artificial intelligence, robots are the first thing that comes in our minds but they are just part of overall artificial intelligence.

Artificial intelligence is a much wider and bigger concept and it is applied to almost all the sectors like psychology, healthcare, linguistics, computer science, and the financial industry.

Artificial intelligence has three main components, computational systems, data and data management, and advanced AI algorithms (code).

Bioinformatics

Bioinformatics is the branch of computer science that includes biology, statistics, mathematics, computer science, and information engineering to develop software tools to interpret and understand biological data.

Bioinformatics is very useful in today’s scenario to manage and handle biological data and medicines. It includes transfer, storage, pipeline, algorithm etc. of genome data and analyzes the genome sequencing data.

Bioinformatics includes activities like the organization of information which focuses on maintenance of the data and creation of information and analysis of the information where the methods are developed to find out the structure and functions of new protein or structural RNA sequences.

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